Cam"e*ra ob*scu"ra (?). [LL. camera chamber + L. obscurus, obscura, dark.] Opt.
An apparatus in which the images of extermal objects, formed by a convex lens or a concave mirror, are thrown on a paper or other white surface placed in the focus of the lens or mirror within a darkened chamber, or box, so that the outlines may be traced.
An apparatus in which the image of an external object or objects is, by means of lenses. thrown upon a sensitized plate or surface placed at the back or an extensible darkened box or chamber variously modifled; -- commonly called simply the camera.
© Webster 1913.